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A kind of fluorine-containing cross-linked polyether demulsifier and its preparation method

A fluorine-containing polyether and demulsifier technology, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of inability to meet rapid treatment, short on-site treatment process, unqualified export crude oil, etc., to reduce the interface strength and dehydration. Fast speed and the effect of reducing moisture content

Active Publication Date: 2019-10-15
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for oil fields with ultra-high water content (>95%) and extremely short on-site treatment process (<10min), conventional polyether demulsifiers often cannot meet the requirements of rapid treatment, especially in reducing the water content of crude oil after dehydration. Resulting in unqualified crude oil exported

Method used

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  • A kind of fluorine-containing cross-linked polyether demulsifier and its preparation method
  • A kind of fluorine-containing cross-linked polyether demulsifier and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1 adopts the following steps to realize the present invention:

[0020] (1) Add 100g of 4-fluorophenol and 3g of potassium hydroxide into the high-temperature and high-pressure reactor, heat up to 90°C, vacuum dehydrate for 30min, continue to heat up to about 120°C, gradually introduce 900g of propylene oxide, and control the reaction temperature at 120°C ~140°C, pressure lower than 0.4MPa, after reaction in the kettle to negative pressure, keep the reaction at 130°C for 1 hour, and then get 4-fluorophenol polyoxypropylene ether oil head;

[0021] (2) Take 100g of the 4-fluorophenol polyoxypropylene ether oil head synthesized in step (1) of this example, add 1.2g of potassium hydroxide, heat up to 90°C, vacuum dehydrate for 30min, continue to heat up to about 120°C, gradually 200g of propylene oxide was introduced, and the reaction temperature was controlled at 120-140°C, and the pressure was lower than 0.4MPa. After the reaction in the kettle reached negativ...

Embodiment 2

[0023] Embodiment 2 adopts the following steps to realize the present invention:

[0024] (1) Take 100g of the 4-fluorophenol polyoxypropylene ether oil head synthesized in step (1) of Example 1, put in 2.25g of potassium hydroxide, heat up to 90°C, vacuum dehydrate for 30min, and continue to heat up to about 120°C , gradually feed 400g of propylene oxide, and control the reaction temperature at 120-140°C and the pressure below 0.4MPa. After the reaction in the kettle reaches negative pressure, keep the reaction at 130°C for 1h. When the temperature drops to about 110°C, gradually introduce 250g of ethylene oxide, control the reaction temperature to 110-130°C, and the pressure to be lower than 0.4MPa. After the reaction in the kettle reaches negative pressure, keep it warm for 1 hour to obtain 4-fluorophenol polymer Oxypropylene polyoxyethylene ether (B);

[0025] (2) Take 100 g of 4-fluorophenol polyoxypropylene polyoxyethylene ether (B) synthesized in step (1) of this examp...

Embodiment 3

[0026] Embodiment 3 adopts the following steps to realize the present invention:

[0027] (1) Add 100g of 3,4-difluorophenol and 4g of potassium hydroxide into the high-temperature and high-pressure reactor, heat up to 90°C, vacuum dehydrate for 30min, continue to heat up to about 120°C, gradually introduce 900g of propylene oxide, and control The reaction temperature is 120-140°C and the pressure is lower than 0.4MPa. After the reaction in the kettle reaches negative pressure, the reaction is carried out at 130°C for 1 hour to obtain 3,4-difluorophenol polyoxypropylene ether oil head;

[0028] (2) Take 100g of the 3,4-difluorophenol polyoxypropylene ether oil head synthesized in step (1) of this example, add 4g of potassium hydroxide, heat up to 90°C, vacuum dehydrate for 30min, and continue to heat up to about 120°C , gradually feed 700g of propylene oxide, and control the reaction temperature at 120-140°C and the pressure below 0.4MPa. After the reaction in the kettle reach...

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Abstract

The invention discloses a fluoride-contained crosslinked polyether demulsifier and a preparation method thereof. The fluoride-contained crosslinked polyether demulsifier is prepared by adding an initiator and potassium hydroxide to a high-temperature and high-pressure reaction vessel, heating and dehydrating in vacuum, charging propylene epoxide and ethylene oxide, performing anion block polymerizing to obtain fluoride-contained polyether, and then reacting the fluoride-contained polyether and unsaturated acid in an alkylbenzene solvent under the effects of an esterifying catalyst and the initiator. The fluoride-contained crosslinked polyether demulsifier has the characteristics of a plurality of aromatic nucleuses, a plurality of branches, and high molecular weight, is capable of effectively reducing the oil-water interface strength and achieving the purpose of completely separating oil and water, and can also be independently used as or compounded with other demulsifiers to be used as the demulsifier for dehydrating liquid produced by an oilfield and dehydrating and desalting of an oil refinery.

Description

technical field [0001] The invention relates to a demulsifier and a preparation method thereof, in particular to a fluorine-containing crosslinked polyether demulsifier and a preparation method thereof, belonging to the technical field of petroleum processing. Background technique [0002] In recent years, as the development and production of most oilfields in China have entered the middle and late stages, the water content of crude oil production fluids has increased year by year. Natural emulsifiers such as colloids, asphaltenes, solid particles, etc. in crude oil components, as well as various chemical additives added in the development and production process, greatly increase the complexity of the produced fluid, and make the oil-water interface strength obvious Increase, the stability of the emulsion is enhanced, which seriously affects the production safety of crude oil. Injecting a certain concentration of chemical demulsifier into the crude oil emulsion is the most ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04C08G65/26C08F283/06C08F220/06
Inventor 胡徐彦谢进宜周国华魏强
Owner CHINA NAT OFFSHORE OIL CORP
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